oldSet := sets.New(oldClaim.Status.ReservedFor...)
				newSet := sets.New(resourceClaim.Status.ReservedFor...)
				newItems := newSet.Difference(oldSet)
				if len(newItems) > 0 {
					allErrs = append(allErrs, field.Forbidden(fldPath.Child("reservedFor"), "new entries may not be added while `deallocationRequested` or `deletionTimestamp` are set"))
				}
			}
		}